Side-wall tuyere



DEC. 15,

c.,F. MILLER sm: WALL TuYtns Filed April 2. 1923 INVENTOR ATTORNEY oriliiig Patented Deer 15, 1925.

UNITED STATE1 CHAIR/LES 1?. minute, or MOORE, PENNSYLVANIA, nssreno'n Townsmienbusn ELECTRIC AND ieANUrnc-rnniiie COMPANY.

SIDE-WALL TUYiinn.

Application filed April 2,

To all whom it may concern:

Be it known that I, CHARLES F. MILLER, a citizen of the United States,and a resident of Moore, in the county of, Delaware and State ofPennsylvania, have invented new and useful Improvement in Side-Nailliuyere, of which the following is a specification.

This invention relates to tuyere plates of the character employed inhigh temperature furnaces, and'particularly to side Wall aircooledtuyere plates for such furnaces and it has for an object to provide atuyere plate of the character designated which shall have heatdissipating surfaces greatly in excess of its heat absorbing surfaces,and which shall have increased strength to resist distortion due toexcessive and uneven heating. It is a further object of my invention toprovide a metal tuycre plate presenting a highly refractory innersurface to the furnace, and provided 011 the outer side with strips ofsteel embedded in the metal and serving to assist in the dissipation ofthe heat absorbed by the plate and also serving to reinforce the plateagainst distortion or warping.

These and other objects of my invention, which are made more manifest inthe further description thereof, may be attained by the employment ofapparatus illustrated in the accompanying drawing in which: Fig. 1 is aview in vertical section through a furnace side wall tuyere embodyingthe present invention; Fig. 2 is a View in elevation of a side walltuyere plate; and Fig. 3 is a fragmentary View in transverse section ofthe tuyere plate.

In the drawing I show a side wall tuyere plate 10 mounted on a bracket11 which is supported on the wall air box 12 of a conventional stokerfurnace.

The tuyere plate 10 is preferably constructed of cast iron and providedwith a receding edge flange 14:, forming a seat ror an adjacent tuyereplate, a base lug 15 and a top hook 16, each engaging the bracket 11 toretain the plate in position.

In casting the tuyere plate 10, steel strips 18, which are relativelythin and substantially equal in length of the tuyere are arranged inparallel spaced relation in the mould in such manner that, when themolten iron is poured, the steel strips are partially embedded in thetuyere plate. The major portion of each of the steel plates, however,

1921;. Serial N5. 629,538.

prcfe ably protrudes beyond the surface of the casting. The niu'nbcr ofthe steel strips and the extent of their protruding surfaces may beequal to two or three times the plane heat absorbing surface of theexposed face of the tuyere. The tuyere plates are perforated, as atbetween the i i icing steel strips, the perforation being preferablyformed by the provision of cores in the mould at time of casting.

The high maintenance cost of high duty furnaces is large; due to iii-ctfor frequent replacement of burned out and distorted parts. Tuycrcplates are more frequently removed than other parts of the furnace andside wall tuycres are subjected to extreme heats both from incandescentcoal and highly heated furnace gases. From the foregoing, it is apparentthat a tuyel'e plate having a longer life than those at the present timeemployed is provided. The

greatly increased heat dissipating area of the present tuyere, and thereinforcement of the plate against distortion because of the many steelbeams embedded in the plate, contribute to produce a plate which has alonger life and which is more economical in the long run than similartuycre plates as at present constructed.

While I have shown my invention in but one form, it will be obvious tothose skilled in the art that it is not so limited, but is susceptibleof various other changes and modifications, without departing from thespirit thereof, and I desire, therefore, that only such limitationsshall be placed thereupon as are imposed by the prior art or as arespecifically set forth in the appended claims.

lVhat I claim is:

1. A side wall tuyere for stokerfurnaces comprising a ierforated. metalplate and a plurality of steel strips partially embedded in the metalplate and partially protruding from the plate.

2. A side wall tuyere comprising a perforated cast iron plate, and aplurality of steel strips partially embedded in the cast iron plate andpartially protruding from a face of the plate.

A side wall tuyere comprising a perforated cast iron plate, and aplurality of relatively thin steel strips partially embedded in the ironplate and partially protruding from a face of the plate.

4. A side wall tuyere comprising a perfo- A late, said plate 25 betweenthe stoker furnaces (rust H'Oil plate for exposure to 30 sgiosed edzipted the furnace and the other r'lions: Y'

=1 .vingg one HUlQ ad perfo trips. A side will $1 eel s vmnprising Mfrling from a (ace 0; the p 0 and a w rotrud XI] for slol *r 1 each stripp side wall tuyere rated cast iron plat thin steel strips each hzwinportion 0 55 ml "he pl te. 5. i; eunlpri side ded in 'mrtiallv embedarcnzlly pr rri'uhng from :ipted for exposure 35 exure to cool air, anda pluwasting ad e, and u plustrips &1 of the trip proside 40 Me hav- '-e'l for exposure to the ir. a pluralembedded em the side .ipe m-e to air.

was? iron i 1210 and the ol me this 29th (luv 0: ldnrvh.

HARLEF; F. MILLER.

are l lurul- 'mrnzures furnaces and :1 p Hee 1p pr0- for sf lie heigh upi j 1 lat an the (led in the metal of iron , I t 3 embed vortion 01?each qt] y 19 plate, the

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